/*
* Conditions Of Use 
* 
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain.  As a result, a formal
* license is not needed to use the software.
* 
* This software is provided by NIST as a service and is expressly
* provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY.  NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
* 
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*  
* .
* 
*/
package gov.nist.javax.sip.parser;

import gov.nist.javax.sip.header.*;
import java.text.ParseException;
import javax.sip.*;

/**
 * Parser for TimeStamp header.
 *
 * @version 1.2 $Revision: 1.7 $ $Date: 2006/08/15 21:44:50 $
 *
 * @author Olivier Deruelle   <br/>
 * @author M. Ranganathan   <br/>
 *
 * 
 */
public class TimeStampParser extends HeaderParser {

	/**
	 * Creates a new instance of TimeStampParser 
	 * @param timeStamp the header to parse
	 */
	public TimeStampParser(String timeStamp) {
		super(timeStamp);
	}

	/**
	 * Constructor
	 * @param lexer the lexer to use to parse the header
	 */
	protected TimeStampParser(Lexer lexer) {
		super(lexer);
	}

	/**
	 * parse the String message
	 * @return SIPHeader (TimeStamp object)
	 * @throws SIPParseException if the message does not respect the spec.
	 */
	public SIPHeader parse() throws ParseException {

		if (debug)
			dbg_enter("TimeStampParser.parse");
		TimeStamp timeStamp = new TimeStamp();
		try {
			headerName(TokenTypes.TIMESTAMP);

			timeStamp.setHeaderName(SIPHeaderNames.TIMESTAMP);

			this.lexer.SPorHT();
			String firstNumber = this.lexer.number();

			try {
				
				if (lexer.lookAhead(0) == '.') {
					this.lexer.match('.');
					String secondNumber = this.lexer.number();

					String s = new String(firstNumber + "." + secondNumber);
					float ts = Float.parseFloat(s);
					timeStamp.setTimeStamp(ts);
				} else {
					long ts = Long.parseLong(firstNumber);
					timeStamp.setTime(ts);
				}
					
				
			} catch (NumberFormatException ex) {
				throw createParseException(ex.getMessage());
			} catch (InvalidArgumentException ex) {
				throw createParseException(ex.getMessage());
			}

			this.lexer.SPorHT();
			if (lexer.lookAhead(0) != '\n') {
				firstNumber = this.lexer.number();

				try {
					
					if (lexer.lookAhead(0) == '.') {
						this.lexer.match('.');
						String secondNumber = this.lexer.number();

						String s = new String(firstNumber + "." + secondNumber);
						float ts = Float.parseFloat(s);
						timeStamp.setDelay(ts);
					} else {
						int ts = Integer.parseInt(firstNumber);
						timeStamp.setDelay(ts);
					}

				
				} catch (NumberFormatException ex) {
					throw createParseException(ex.getMessage());
				} catch (InvalidArgumentException ex) {
					throw createParseException(ex.getMessage());
				}
			}

		} finally {
			if (debug)
				dbg_leave("TimeStampParser.parse");
		}

		return timeStamp;
	}

	
	
	
}
/*
 * $Log: TimeStampParser.java,v $
 * Revision 1.7  2006/08/15 21:44:50  mranga
 * Issue number:
 * Obtained from:
 * Submitted by:  mranga
 * Reviewed by:   mranga
 * Incorporating the latest API changes from Phelim
 * CVS: ----------------------------------------------------------------------
 * CVS: Issue number:
 * CVS:   If this change addresses one or more issues,
 * CVS:   then enter the issue number(s) here.
 * CVS: Obtained from:
 * CVS:   If this change has been taken from another system,
 * CVS:   then name the system in this line, otherwise delete it.
 * CVS: Submitted by:
 * CVS:   If this code has been contributed to the project by someone else; i.e.,
 * CVS:   they sent us a patch or a set of diffs, then include their name/email
 * CVS:   address here. If this is your work then delete this line.
 * CVS: Reviewed by:
 * CVS:   If we are doing pre-commit code reviews and someone else has
 * CVS:   reviewed your changes, include their name(s) here.
 * CVS:   If you have not had it reviewed then delete this line.
 *
 * Revision 1.6  2006/07/13 09:02:14  mranga
 * Issue number:
 * Obtained from:
 * Submitted by:  jeroen van bemmel
 * Reviewed by:   mranga
 * Moved some changes from jain-sip-1.2 to java.net
 *
 * CVS: ----------------------------------------------------------------------
 * CVS: Issue number:
 * CVS:   If this change addresses one or more issues,
 * CVS:   then enter the issue number(s) here.
 * CVS: Obtained from:
 * CVS:   If this change has been taken from another system,
 * CVS:   then name the system in this line, otherwise delete it.
 * CVS: Submitted by:
 * CVS:   If this code has been contributed to the project by someone else; i.e.,
 * CVS:   they sent us a patch or a set of diffs, then include their name/email
 * CVS:   address here. If this is your work then delete this line.
 * CVS: Reviewed by:
 * CVS:   If we are doing pre-commit code reviews and someone else has
 * CVS:   reviewed your changes, include their name(s) here.
 * CVS:   If you have not had it reviewed then delete this line.
 *
 * Revision 1.5  2006/06/19 06:47:27  mranga
 * javadoc fixups
 *
 * Revision 1.4  2006/06/16 15:26:28  mranga
 * Added NIST disclaimer to all public domain files. Clean up some javadoc. Fixed a leak
 *
 * Revision 1.3  2006/05/25 23:46:23  mranga
 * Added @author NIST to all API files. Moved a package around in the tck directory.
 *
 * Ranga.
 *
 * Revision 1.2  2006/05/18 10:08:43  mranga
 * Fixes null pointer in comparison when host is not specified. Add methods to allow longs and ints as args in TimeStamp Header.
 *
 * Ranga.
 *
 * Revision 1.1.1.1  2005/10/04 17:12:36  mranga
 *
 * Import
 *
 *
 * Revision 1.4  2004/01/22 13:26:32  sverker
 * Issue number:
 * Obtained from:
 * Submitted by:  sverker
 * Reviewed by:   mranga
 *
 * Major reformat of code to conform with style guide. Resolved compiler and javadoc warnings. Added CVS tags.
 *
 * CVS: ----------------------------------------------------------------------
 * CVS: Issue number:
 * CVS:   If this change addresses one or more issues,
 * CVS:   then enter the issue number(s) here.
 * CVS: Obtained from:
 * CVS:   If this change has been taken from another system,
 * CVS:   then name the system in this line, otherwise delete it.
 * CVS: Submitted by:
 * CVS:   If this code has been contributed to the project by someone else; i.e.,
 * CVS:   they sent us a patch or a set of diffs, then include their name/email
 * CVS:   address here. If this is your work then delete this line.
 * CVS: Reviewed by:
 * CVS:   If we are doing pre-commit code reviews and someone else has
 * CVS:   reviewed your changes, include their name(s) here.
 * CVS:   If you have not had it reviewed then delete this line.
 *
 */
